(19)

(11)

EP 1 828 756 A1

(12)

(43) Date of publication: 05.09.2007 Bulletin 2007/36 (21) Application number: 04809083.1 (22) Date of filing: 16.12.2004

(51) International Patent Classification (IPC):  G01N 21/91(2006.01) (86) International application number: PCT/SE2004/001910 (87) International publication number: WO 2006/065180 (22.06.2006 Gazette 2006/25)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (71) Applicant: Volvo Aero Corporation S-461 81 Trollhättan (SE)	(72) Inventor: HENRIKSON, Per S-461 73 Trollhättan (SE) (74) Representative: Fröhling, Werner Otto  Volvo Technology Corporation Corporate Patents 06820, M1.7 405 08 Göteborg 405 08 Göteborg (SE)